Question
Asked Oct 25, 2019
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Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7.

Find the 87th percentile.

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Expert Answer

Step 1

Solution:

From the given information, mean value is 50, standard deviation value is 7. Let the random variable X follows normal distribution with population mean as 50 and standard deviation score as 7.

Step 2

The 87th percentile is obtained below:

From Excel, NORM.INV(0.87,50,7)=57.8847.

...
fNORM.INV(0.87,50,7)
A1
A
B
C
D
F
1 57.8847
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fNORM.INV(0.87,50,7) A1 A B C D F 1 57.8847

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